fbpx
Login

 

Jump to Forum..

Oil leak

in 912 / 914 Technical Questions 7 years ago
So I have this 912ULS. It is a early 2006 with 780 hours TTSN. For several months now I have oil seeping from between the case halves, top and bottom. Not much, but sometimes there is a small puddle under the engine.

I have a a 3 blade Whirlwind prop that has long been set per Roger's recommendation. Before that it was slightly less pitch for stol.

Will there be any long term problems from this condition, other than the mess, or do I need to do an overhaul, with new cases, halfway through TBO?

Alan

  • Re: Oil leak

    by » 7 years ago

    Hi Alan,
    Need a tad more info.
    So you have oil on the floor all the time? (or coolant)
    Are you absolutely sure it's from the case halves? This would be fairly rare. Could it be from the cylinder side of things?
    If it's oil and confirmed from the case have you tried to torque the case bolts?
    Is it the case half seams or possible cracks? Cracks can come from over pitching the prop and running way to low in WOT rpms and was more prevalent in the 1500 hr. engines.

    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-349-7056 Cell

      
    Report

  • Re: Oil leak

    by » 7 years ago

    Hi Roger.

    I'm going out to the airport this afternoon and I'll take a picture. I've been flying this engine for more than eleven years and I'm almost positive I've never flown it with too positive pitch. I'm going to check everywhere again but I know for sure oil is seeping from the top case halves.
      
    Report

  • Re: Oil leak

    by » 7 years ago

    Ok. Here are a couple of pics. I looked all under the engine, at least as well as I could with all the pipes and hoses. There might be another leak from the starboard bottom of the accessory case or just from that top case leak working it's way down.
    20171205_122358_resized_2017-12-05.jpg (You do not have access to download this file.)
    20171205_123051_resized.jpg (You do not have access to download this file.)
      
    Report

  • Re: Oil leak

    by » 7 years ago

    That almost looks like it's coming up from the cyl. and drooling down.

    Roger Lee
    LSRM-A & Rotax Instructor & Rotax IRC
    Tucson, AZ Ryan Airfield (KRYN)
    520-349-7056 Cell

      
    Report

  • Re: Oil leak

    by » 7 years ago

    So you're saying that the cylinder.base gasket is leaking and the air is pushing that oil up and over. I never thought of that. Thank you, Roger.
      
    Report
You do not have permissions to reply to this topic.
Related Topics
Title Category Replies
Oil System Purge Push Gauge 912 / 914 Technical Questions 2
Rotax 912 80hp no oil pressure after oil change 912 / 914 Technical Questions 5
Oil overflow 912 / 914 Technical Questions 15
Trigger Coil Gap 912 / 914 Technical Questions 1
Oil pressure senders 912 / 914 Technical Questions 3
Follow Us

Recent Videos

Safety First!

 

To receive critical-to-safety information on your ROTAX Engine, please subscribe to
ROTAX-OWNER.COM

ROTALK News



ROTALK NEWS Episode 5
Rotax-powered Sling aircraft from The Aircraft Factory, the AVMAP Navigation and engine monitoring system, and the Rotax powered Tucano Experimental and Light-Sport Aircraft.



ROTALK NEWS Episode 4
ROTAX's 915iS-powered Aquila A211 test aircraft, the Scheibe SF-25C Falke (first-ever 912-equipped aircraft!) and ROTAX factory in Gunskirchen, Austria.


ROTALK NEWS Episode 3
Michael Smith's Rotax-Powered Searey Circumnavigation, the amazing Rotax-Powered Lockwood Aircam and Anthony Caere's chimpanzee rescue operations.

Prize Giveaway!


SUBSCRIBE NOW
to automatically enter this years draw!

Login